[PATCH v5 4/4] kernel: virtio modules depend on x86_kvm_guest

[openwrt.git] / include / host.mk

diff --git a/include/host.mk b/include/host.mk
index 6458881..8092e8d 100644 (file)
--- a/include/host.mk
+++ b/include/host.mk
@@ -1,28 +1,64 @@
 # 
-# Copyright (C) 2006 OpenWrt.org
+# Copyright (C) 2007-2010 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
 #
 
-include $(TOPDIR)/.host.mk
+TMP_DIR ?= $(TOPDIR)/tmp
+ifeq ($(if $(TARGET_BUILD),,$(DUMP)),)
+  -include $(TMP_DIR)/.host.mk
+endif
 
-$(TOPDIR)/.host.mk: $(INCLUDE_DIR)/host.mk
-       echo "HOST_OS:=`uname`" > $@
-       echo "HOST_ARCH:=` \
-               $(HOSTCC) -dumpmachine | sed -e s'/-.*//' \
-                       -e 's/sparc.*/sparc/' \
-                       -e 's/arm.*/arm/' \
-                       -e 's/m68k.*/m68k/' \
-                       -e 's/ppc/powerpc/' \
-                       -e 's/v850.*/v850/' \
-                       -e 's/sh[234]/sh/' \
-                       -e 's/mips-.*/mips/' \
-                       -e 's/mipsel-.*/mipsel/' \
-                       -e 's/cris.*/cris/' \
-                       -e 's/i[3-9]86/i386/'`" >> $@
-       echo "GNU_HOST_NAME:=`$(HOSTCC) -dumpmachine`" >> $@
-       if tar --version 2>&1 | grep 'GNU' >/dev/null; then \
-               echo "TAR_OPTIONS+=--wildcards" >> $@; \
-       fi
+export TAR FIND
 
+ifneq ($(__host_inc),1)
+__host_inc:=1
+
+try-run = $(shell set -e; \
+       TMP_F="$(TMP_DIR)/try-run.$$$$.tmp"; \
+       if ($(1)) >/dev/null 2>&1; then echo "$(2)"; else echo "$(3)"; fi; \
+       rm -f "$$TMP_F"; \
+)
+
+host-cc-option = $(call try-run, \
+       $(HOSTCC) $(HOST_CFLAGS) $(1) -c -xc /dev/null -o "$$TMP_F",$(1),$(2) \
+)
+
+.PRECIOUS: $(TMP_DIR)/.host.mk
+$(TMP_DIR)/.host.mk: $(TOPDIR)/include/host.mk
+       @mkdir -p $(TMP_DIR)
+       @( \
+               HOST_OS=`uname`; \
+               case "$$HOST_OS" in \
+                       Linux) HOST_ARCH=`uname -m`;; \
+                       Darwin) HOST_ARCH=`uname -m`;; \
+                       *) HOST_ARCH=`uname -p`;; \
+               esac; \
+               GNU_HOST_NAME=`gcc -dumpmachine`; \
+               [ -z "$$GNU_HOST_NAME" -o "$$HOST_OS" == "Darwin" ] && \
+                       GNU_HOST_NAME=`$(TOPDIR)/scripts/config.guess`; \
+               echo "HOST_OS:=$$HOST_OS" > $@; \
+               echo "HOST_ARCH:=$$HOST_ARCH" >> $@; \
+               echo "GNU_HOST_NAME:=$$GNU_HOST_NAME" >> $@; \
+               TAR=`which gtar 2>/dev/null`; \
+               [ -n "$$TAR" -a -x "$$TAR" ] || TAR=`which gnutar 2>/dev/null`; \
+               [ -n "$$TAR" -a -x "$$TAR" ] || TAR=`which tar 2>/dev/null`; \
+               echo "TAR:=$$TAR" >> $@; \
+               FIND=`which gfind 2>/dev/null`; \
+               [ -n "$$FIND" -a -x "$$FIND" ] || FIND=`which find 2>/dev/null`; \
+               echo "FIND:=$$FIND" >> $@; \
+               echo "BASH:=$(shell which bash)" >> $@; \
+               if $$FIND -L /tmp -maxdepth 0 >/dev/null 2>/dev/null; then \
+                       echo "FIND_L=$$FIND -L \$$(1)" >>$@; \
+               else \
+                       echo "FIND_L=$$FIND \$$(1) -follow" >> $@; \
+               fi; \
+               if xargs --help 2>&1 | grep 'gnu.org' >/dev/null; then \
+                       echo 'XARGS:=xargs -r' >> $@; \
+               else \
+                       echo 'XARGS:=xargs' >> $@; \
+               fi; \
+       )
+
+endif